Technical Definition:
O2 Circuit High Voltage (Bank 1, Sensor 2)
Trouble Code: P0138
Address: 0x0138
System: Powertrain
Subsystem:
Address: 0x0138
System: Powertrain
Subsystem:
Technical Description:
The Heated Oxygen Sensor (2) located rear of catalytic converter produces an output signal relative to oxygen storage capacity of catalytic converter.
Possible Causes:
- Faulty O2 sensor
- Short to battery voltage in O2 sensor signal circuit
- High fuel pressure
Possible Symptoms:
O2 Sensor Circuit High Voltage Bank 1 Sensor 2
Possible Solutions:
- Replace O2 sensor
- Repair short to battery voltage in o2 sensor signal circuit
OBD-II Trouble Code Type:
Diagnostic Step:
Tech Notes:
– Faulty Rear Heated Oxygen Sensor Bank 1
– Rear Heated Oxygen Sensor Bank 1 harness is open or shorted
– Rear Heated Oxygen Sensor Bank 1 circuit poor electrical connection
– Intake air leaks
– Exhaust gas leaks
– Inappropriate fuel pressure
– Faulty fuel injectors
Specific Makes:
– High Fuel Consumption
– Excessive Smoke from Exhaust